Method for controlling cracking of mold shell for high-temperature alloy precision casting

Abstract

The invention provides a method for controlling cracking of a mold shell for high-temperature alloy precision casting, which comprises the following steps of: (1) wiping the surface of a wax mold module by using a mold shell reinforcing agent, and standing; the formwork reinforcing agent is prepared from water, a film-forming agent, a wetting agent, a defoaming agent and a sterilizing agent according to the mass ratio of (30-50): (50-70): (1-2): (0.05-0.1): (0.2-0.3). And (2) the surface of the wax mold module is sequentially dipped with surface layer slurry and surface layer sand, drying is conducted, then the surface of the wax mold module is sequentially dipped with back layer slurry and back layer sand, and the mold shell for high-temperature alloy precision casting is obtained. The method is easy to operate and low in treatment cost, the problem of surface cracking of the large-surface wax mold is effectively solved, and the method is suitable for large-scale application and popularization.

Description

Technical Field

[0001] The invention relates to the technical field of investment casting, and in particular to a method for controlling cracking of a mold shell for high-temperature alloy precision casting. Background Art

[0002] With the progress of the times and the deepening of the world's exploration, the materials used to overcome high temperature and high pressure environments - high temperature alloys - are also expanding in the world's development. Whether it is aerospace or deep well oil production, high temperature alloys are needed to overcome the harsh environment. Investment casting technology has a long history and sophisticated technology. High temperature alloys are expensive, and the products manufactured are high-precision and complex in shape. Therefore, precision casting has become one of the main processing methods for high temperature alloys.

[0003] In precision casting, shell making is a very important link. The strength, air permeability, collapsibility and inner wall smoothness of the mold shell directly affect the qualified rate of precision casting products.

[0004] The current shell manufacturing process is: dip the assembled wax mold into slurry, sprinkle sand and dry, repeat the slurry, sprinkle sand and dry, repeat many times until the required thickness is reached, then remove the wax mold through high-pressure steam or hot water, and bake to obtain a mold shell with sufficient strength and high temperature stability. The first and second mold shell layers are called surface layer and transition layer. The refractory sand used in combination has a small mesh and small particles. It is easy to crack due to the drying process. Especially for wax molds with large surfaces, the surface tension is large, and the mold shell is more likely to crack in the surface layer and transition layer stage during the manufacturing process, resulting in an increase in the mold shell scrap rate, which seriously affects production efficiency.

[0005] According to the current shell making process, for some products with large flat surfaces, the shell surface layer and transition layer are prone to cracking. If there are cracks on the inner surface of the shell, the slurry will penetrate into the inner surface of the shell through the cracks during the subsequent shell manufacturing, resulting in incomplete shell surface layer, multiple shell materials, and shell bulging, which will cause defects such as flash, slag inclusions, depressions, and bulging of the product during pouring, resulting in the scrapping of the shell or the scrapping of the product.

[0006] CN113547067A discloses a silica sol adhesive for investment casting, a mold shell surface slurry for investment casting, and an investment casting method. The silica sol adhesive for investment casting includes the following components in parts by mass: 850 to 1000 parts of silica sol; 8 to 30 parts of redispersible latex powder; 8 to 20 parts of hydroxymethyl cellulose; 8 to 15 parts of low temperature compensation shaping cross-linking material; and 2 to 18 parts of auxiliary agent. It can better improve the wet strength, mold shell drying speed and drying environment performance of investment casting mold shell.

[0007] CN106734886A discloses a method for preventing the mold shell or mold assembly from cracking during the shell making process. By adding a ceramic rod, the stress caused by the expansion of the wax mold during the dewaxing process will be transferred to the ceramic rod. At the same time, the position where the ceramic rod is added is easier to hang slurry, so that the position where the ceramic rod is added can ensure that there is enough slurry and sand material, so as to achieve the effect of strengthening the mold shell, improve the ability of the mold shell to withstand stress, and avoid cracking. In addition, during the shell making process, by arranging a ceramic rod between the pouring cup and the horizontal runner or vertical runner, not only can the strength of the bearing force between each runner and the pouring cup be increased, but also during the shell making process, the manipulator can disperse part of the force borne at the connection between the pouring cup and the horizontal runner or vertical runner to the ceramic rod, thereby effectively preventing the mold shell from cracking due to the low strength between the pouring cup and the horizontal runner or vertical runner.

[0008] CN111558693A discloses a method for avoiding cracking of the surface shell of thick parts of parts. By opening a wax overflow groove on the parts to be processed whose thickness exceeds the thick wall threshold, the wall thickness of the wax mold is made to tend to the same thickness; when the wax mold with the wax overflow groove expands due to heat, the excess wax mold can flow to the wax overflow groove, so that the wax mold has an extra melting space and will not expand the mold shell, thereby avoiding the cracking of the internal surface layer or transition layer of the mold shell due to the melting of the wax mold.

[0009] However, the above method still has certain shortcomings when applied to mold shells for high-temperature alloy precision casting. Summary of the invention

[0010] In order to solve the above technical problems, the present invention provides a method for controlling the cracking of mold shells for high-temperature alloy precision casting, by using a special mold shell enhancer to enhance the bonding strength of the mold shell before the surface layer of the wax mold module is dipped in slurry, thereby improving the cracking of the mold shell surface and improving the product qualification rate.

[0011] To achieve this object, the present invention adopts the following technical solutions:

[0012] The present invention provides a method for controlling cracking of a mold shell for high-temperature alloy precision casting, the method comprising the following steps:

[0013] (1) Wipe the surface of the wax mold assembly with a mold shell enhancer and let it stand;

[0014] The formwork reinforcement agent includes water, a film former, a wetting agent, a defoaming agent and a bactericide in a mass ratio of (30-50):(50-70):(1-2):(0.05-0.1):(0.2-0.3);

[0015] (2) The surface of the wax mold module is dipped with surface slurry and surface sand in turn, dried, and then dipped with back slurry and back sand in turn to obtain a mold shell for high-temperature alloy precision casting.

[0016] The method for controlling cracking of mold shells for precision casting of high-temperature alloys described in the present invention is to evenly apply the mold shell reinforcing agent on the surface of the wax mold module before the process of dipping the surface layer of the shell, so as to strengthen the connection between the surface layer and the surface of the wax mold module. This treatment can greatly improve the cracking of the mold shell surface layer and the transition layer, especially for wax molds with large planes. The mold shell reinforcing agent described in the present invention includes water, film formers, wetting agents, defoaming agents and bactericides in a mass ratio of (30-50): (50-70): (1-2): (0.05-0.1): (0.2-0.3), which is beneficial to enhance the bonding strength of the mold shell. Too much film former will lead to too many bubbles, affecting the surface quality of the mold shell; too little will lead to poor molding effect and affect the shell cleaning effect; too much wetting agent will lead to too thick coating, affecting the air permeability of the mold shell; too little may fail to complete the wetting effect, resulting in delamination and other situations.

[0017] In step (2) of the present invention, the surface layer slurry and the back layer slurry are dipped multiple times as needed.

[0018] Preferably, the film-forming agent in step (1) comprises an aqueous solution of ammonium alginate having a mass concentration of 8 to 10 g / L, for example, 8 g / L, 8.3 g / L, 8.5 g / L, 9 g / L, 9.3 g / L, 9.5 g / L or 10 g / L, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0019] Preferably, the wetting agent in step (1) comprises a nonionic surfactant or an anionic surfactant.

[0020] Preferably, the defoaming agent in step (1) comprises a silicon defoaming agent.

[0021] The bactericide of the present invention can be a general bactericide.

[0022] The mixed liquid of various raw materials of the mold shell enhancer in the present invention can be stirred with an electric stirrer to make them fully mixed and uniform; the mold shell enhancer is dipped with absorbent cotton and the surface of the wax mold module is wiped. After wiping, the excess mixed solution on the surface of the wax mold is wiped off.

[0023] Preferably, the standing time in step (1) is 30 to 60 seconds, for example, 30 seconds, 35 seconds, 40 seconds, 45 seconds, 50 seconds, 55 seconds or 60 seconds, etc., but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0024] In the present invention, the standing time is preferably 30 to 60 seconds, so that the mold shell reinforcing agent can completely cover the surface of the wax mold module.

[0025] Preferably, the surface layer slurry in step (2) comprises surface layer alumina slurry.

[0026] Preferably, the surface layer abrasive material comprises fused corundum abrasive material.

[0027] Preferably, the back layer slurry comprises back layer alumina slurry.

[0028] Preferably, the back layer abrasive material comprises fused corundum abrasive material.

[0029] Preferably, the particle size of the surface sand material in step (2) is 100-120 mesh, for example, it can be 100 mesh, 105 mesh, 110 mesh, 115 mesh or 120 mesh, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0030] Preferably, the particle size of the backing layer sand material is 70 mesh or 16-30 mesh, for example, it can be 16 mesh, 20 mesh, 25 mesh or 30 mesh, but it is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0031] In the present invention, the particle size of the surface layer sand material is smaller than that of the back layer sand material because the roughness of the surface layer directly determines the surface roughness of the casting product, and the use of small-sized sand material on the surface layer can ensure that the product has a relatively fine surface. The back layer mold shell does not require a fine surface, but requires a larger-sized sand material to make a mold shell with a larger porosity, which can increase the air permeability of the mold shell, thereby making the mold shell easier to dry.

[0032] The present invention immerses the wax mold module into the surface layer slurry, rotates it slowly to ensure that the surface of the wax mold module is fully soaked with the surface layer slurry, and then slowly rotates it after taking it out to let the excess slurry on the surface of the wax mold module flow away, so that the surface of the module is evenly soaked with a layer of slurry; then, the wax mold module soaked with the surface layer slurry is placed in an electric fused corundum sand spraying machine, so that the surface of the module is fully soaked with the electric fused corundum sand.

[0033] Preferably, the drying temperature in step (2) is 21-25°C, for example, it can be 21°C, 22°C, 22.5°C, 23°C, 23.5°C, 24°C or 25°C, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0034] Preferably, the drying humidity is 40% to 60%, for example, it can be 40%, 45%, 50%, 55%, 58% or 60%, etc., but it is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0035] Preferably, the drying time is 8 to 10 hours, for example, 8 hours, 8.3 hours, 8.5 hours, 9 hours, 9.3 hours, 9.5 hours or 10 hours, etc., but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0036] As a preferred technical solution of the present invention, the method comprises the following steps:

[0037] (1) After wiping the surface of the wax mold assembly with the mold shell enhancer, let it stand for 30 to 60 seconds;

[0038] The shell reinforcement agent includes water, a film-forming agent, a wetting agent, a defoaming agent and a bactericide in a mass ratio of (30-50): (50-70): (1-2): (0.05-0.1): (0.2-0.3); the film-forming agent includes an ammonium alginate aqueous solution with a mass concentration of 8-10 g / L; the wetting agent includes a nonionic surfactant or an anionic surfactant; the defoaming agent includes a silicone defoaming agent;

[0039] (2) The surface of the wax mold module is dipped with a surface slurry and a surface sand material in turn, and dried at a temperature of 21 to 25° C. and a humidity of 40% to 60% for 8 to 10 hours, and then dipped with a back layer slurry and a back layer sand material in turn to obtain a mold shell for high-temperature alloy precision casting;

[0040] The surface layer slurry includes alumina slurry; the surface layer sand material includes fused corundum sand material; the particle size of the surface layer sand material is 100-120 meshes; the back layer slurry includes back layer alumina slurry; the back layer sand material includes fused corundum sand material; the particle size of the back layer sand material is 70 meshes or 16-30 meshes.

[0041] Compared with the prior art, the present invention has at least the following beneficial effects:

[0042] The method for controlling cracking of mold shells for precision casting of high-temperature alloys provided by the present invention is simple to operate and has low processing cost. By wiping the surface of the wax mold module with a mold shell enhancer before the surface of the wax mold module is dipped with surface slurry, the problem of surface cracking of large-surface wax molds is effectively improved, and the method is suitable for large-scale promotion and application. DETAILED DESCRIPTION

[0043] For the convenience of understanding the present invention, the present invention lists the following embodiments. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0044] The present invention is further described in detail below. However, the following examples are only simplified examples of the present invention and do not represent or limit the scope of protection of the present invention. The scope of protection of the present invention shall be subject to the claims.

[0045] In a specific embodiment, the present invention provides a method for controlling cracking of a mold shell for high-temperature alloy precision casting, the method comprising the following steps:

[0046] (1) After wiping the surface of the wax mold assembly with the mold shell enhancer, let it stand for 30 to 60 seconds;

[0047] The shell reinforcement agent includes water, a film-forming agent, a wetting agent, a defoaming agent and a bactericide in a mass ratio of (30-50): (50-70): (1-2): (0.05-0.1): (0.2-0.3); the film-forming agent includes an ammonium alginate aqueous solution with a mass concentration of 8-10 g / L; the wetting agent includes a nonionic surfactant or an anionic surfactant; the defoaming agent includes a silicone defoaming agent;

[0048] (2) The surface of the wax mold module is dipped with a surface slurry and a surface sand material in turn, and dried at a temperature of 21 to 25° C. and a humidity of 40% to 60% for 8 to 10 hours, and then dipped with a back layer slurry and a back layer sand material in turn to obtain a mold shell for high-temperature alloy precision casting;

[0049] The surface layer slurry includes alumina slurry; the surface layer sand material includes fused corundum sand material; the particle size of the fused corundum surface layer sand material is 100-120 meshes; the back layer slurry includes back layer alumina slurry; the back layer sand material includes fused corundum sand material; the particle size of the back layer sand material is 70 meshes or 16-30 meshes.

[0050] The following are typical but non-limiting embodiments of the present invention:

[0051] The surface slurry used in the following examples and comparative examples is alumina slurry, and the specific raw materials include binder: silica sol, wetting agent: non-ionic surfactant Victawet 12, film former: ammonium alginate, bactericide: MBS5050, defoamer: silicon defoamer XM AFE-0110, filler: fused corundum powder, latex: DL 460E latex and grain refiner: cobalt aluminate, and the mass ratio of each raw material is 100:1:3:0.2:0.05:420:5.5:30;

[0052] The back layer slurry used is back layer alumina slurry, and the specific raw materials include binder: silica sol, wetting agent: non-ionic surfactant Victawet 12, bactericide: MBS 5050, defoamer: silicone defoamer XM AFE-0110, filler: fused corundum powder and latex: DL 460E latex, and the mass ratio of each raw material is 100:1:0.2:0.05:315:6.

[0053] The surface layer abrasive material used was provided by IMERYS Fused Minerals; the backing layer abrasive material used was provided by IMERYS Fused Minerals.

[0054] Example 1

[0055] This embodiment provides a method for controlling cracking of a mold shell for high-temperature alloy precision casting, the method comprising the following steps:

[0056] (1) Wipe the surface of the wax mold assembly with a mold shell enhancer and let it stand for 50 seconds;

[0057] The shell reinforcement agent includes water, film former, wetting agent, defoamer and bactericide in a mass ratio of 40:60:1.3:0.08:0.25; the film former is an ammonium alginate aqueous solution with a mass concentration of 9 g / L; the wetting agent is a non-ionic surfactant Victawet 12; the defoamer is a silicone defoamer XM AFE-0110;

[0058] (2) The surface of the wax mold module is dipped with surface slurry and surface sand in turn, dried at a temperature of 22° C. and a humidity of 50% for 8.8 hours, and then dipped with back slurry and back sand in turn to obtain a mold shell for high-temperature alloy precision casting;

[0059] The surface layer slurry is alumina slurry; the surface layer sand material is fused corundum sand material; the particle size of the surface layer sand material is 110 mesh; the back layer slurry is back layer alumina slurry; the back layer sand material is fused corundum sand; the particle size of the back layer sand material is 70 mesh.

[0060] Example 2

[0061] This embodiment provides a method for controlling cracking of a mold shell for high-temperature alloy precision casting, the method comprising the following steps:

[0062] (1) After wiping the surface of the wax mold assembly with a mold shell enhancer, let it stand for 42 seconds;

[0063] The shell reinforcement agent includes water, a film former, a wetting agent, a defoamer and a bactericide in a mass ratio of 37:56:(1-2):0.07:0.28; the film former is an ammonium alginate aqueous solution with a mass concentration of 8.2 g / L; the wetting agent is an anionic surfactant Victawet 12; the defoamer is a silicone defoamer XM AFE-0110;

[0064] (2) The surface of the wax mold module is dipped with surface slurry and surface sand in turn, dried at a temperature of 21.5° C. and a humidity of 49% for 8.1 hours, and then dipped with back slurry and back sand in turn to obtain a mold shell for high-temperature alloy precision casting;

[0065] The surface layer slurry is alumina slurry; the surface layer sand material is fused corundum sand material; the particle size of the surface layer sand material is 100 mesh; the back layer slurry is back layer alumina slurry; the back layer sand material is fused corundum sand; the particle size of the back layer sand material is 30 mesh.

[0066] Example 3

[0067] This embodiment provides a method for controlling cracking of a mold shell for high-temperature alloy precision casting, the method comprising the following steps:

[0068] (1) Wipe the surface of the wax mold assembly with a mold shell enhancer and let it stand for 30 seconds;

[0069] The shell reinforcement agent includes water, a film former, a wetting agent, a defoamer and a bactericide in a mass ratio of 30:70:2:0.05:0.2; the film former is an ammonium alginate aqueous solution with a mass concentration of 8 g / L; the wetting agent is a non-ionic surfactant Victawet 12; the defoamer is a silicone defoamer XM AFE-0110;

[0070] (2) The surface of the wax mold module is dipped with surface slurry and surface sand in turn, dried at a temperature of 25° C. and a humidity of 60% for 8 hours, and then dipped with back slurry and back sand in turn to obtain a mold shell for high-temperature alloy precision casting;

[0071] The surface layer slurry is alumina slurry; the surface layer sand material is fused corundum sand material; the particle size of the surface layer sand material is 120 mesh; the back layer slurry is back layer alumina slurry; the back layer sand material is fused corundum sand; the particle size of the back layer sand material is 70 mesh.

[0072] Example 4

[0073] This embodiment provides a method for controlling cracking of a mold shell for high-temperature alloy precision casting, the method comprising the following steps:

[0074] (1) Wipe the surface of the wax mold assembly with a mold shell enhancer and let it stand for 60 seconds;

[0075] The shell reinforcement agent includes water, a film former, a wetting agent, a defoamer and a bactericide in a mass ratio of 50:50:1:0.1:0.3; the film former is an ammonium alginate aqueous solution with a mass concentration of 10g / L; the wetting agent is an anionic surfactant Victawet 12; the defoamer is a silicone defoamer XM AFE-0110;

[0076] (2) The surface of the wax mold module is dipped with surface slurry and surface sand in turn, dried at a temperature of 21° C. and a humidity of 40% for 10 hours, and then dipped with back slurry and back sand in turn to obtain a mold shell for high-temperature alloy precision casting;

[0077] The surface layer slurry is alumina slurry; the surface layer sand material is fused corundum sand material; the particle size of the surface layer sand material is 100 mesh; the back layer slurry is back layer alumina slurry; the back layer sand material is fused corundum sand; the particle size of the back layer sand material is 16 mesh.

[0078] It can be seen from Examples 1 to 4 that the method for controlling cracking of mold shells for precision casting of high-temperature alloys provided by the present invention is simple to operate, and uses a mold shell enhancer with a specific mass ratio to wipe the surface of the wax mold module, which effectively improves the problem of surface cracking of large-surface wax molds. The resulting mold shells for precision casting of high-temperature alloys will not crack, and the prospect for large-scale promotion and application is broad.

[0079] Comparative Example 1

[0080] This comparative example provides a method for controlling cracking of a mold shell for precision casting of high-temperature alloys. The method is the same as Example 1, except that the mold shell reinforcement includes water, a film former, a wetting agent, a defoaming agent and a bactericide in a mass ratio of 40:80:1.3:0.08:0.25.

[0081] Comparative Example 2

[0082] This comparative example provides a method for controlling cracking of a mold shell for precision casting of high-temperature alloys. The method is the same as Example 1, except that the mold shell reinforcement includes water, a film former, a wetting agent, a defoaming agent and a bactericide in a mass ratio of 40:40:1.3:0.08:0.25.

[0083] It can be seen from Example 1 and Comparative Examples 1 to 2 that the quality of the film-forming agent in Comparative Example 1 is relatively high, which will cause the problem of excessive bubbles, thereby affecting the surface quality of the mold shell; the quality of the film-forming agent in Comparative Example 2 is relatively low, which will lead to poor molding effect and affect the shell cleaning effect.

[0084] Comparative Example 3

[0085] This comparative example provides a method for controlling cracking of a mold shell for precision casting of high-temperature alloys. The method is the same as Example 1, except that the mold shell reinforcement includes water, a film former, a wetting agent, a defoaming agent and a bactericide in a mass ratio of 40:60:2.5:0.08:0.25.

[0086] Comparative Example 4

[0087] This comparative example provides a method for controlling cracking of a mold shell for precision casting of high-temperature alloys. The method is the same as Example 1, except that the mold shell reinforcement includes water, a film former, a wetting agent, a defoaming agent and a bactericide in a mass ratio of 40:60:0.5:0.08:0.25.

[0088] It can be seen from Example 1 and Comparative Examples 3 to 4 that the quality of the wetting agent in Comparative Example 3 is relatively high, which will cause the coating to be too thick and affect the air permeability of the mold shell; the quality of the wetting agent in Comparative Example 4 is relatively low, and the wetting effect cannot be achieved, resulting in delamination and the like.

[0089] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention shall fall within the protection scope and disclosure scope of the present invention.

Claims

1. A method for controlling cracking of a mold shell for high-temperature alloy precision casting, characterized in that: The method comprises the following steps: (1) Wipe the surface of the wax mold assembly with a mold shell enhancer and let it stand; The formwork reinforcement agent includes water, a film former, a wetting agent, a defoaming agent and a bactericide in a mass ratio of (30-50):(50-70):(1-2):(0.05-0.1):(0.2-0.3); (2) The surface of the wax mold module is dipped with a surface layer slurry and a surface layer sand material in turn, dried, and then dipped with a back layer slurry and a back layer sand material in turn, finally obtaining a mold shell for high-temperature alloy precision casting.

2. The method according to claim 1, characterized in that The film-forming agent in step (1) comprises an aqueous solution of ammonium alginate with a mass concentration of 8 to 10 g / L.

3. The method according to claim 1 or 2, characterized in that: The wetting agent in step (1) includes a nonionic surfactant or an anionic surfactant.

4. The method according to any one of claims 1 to 3, characterized in that: The defoaming agent in step (1) includes a silicon defoaming agent.

5. The method according to any one of claims 1 to 4, characterized in that: The standing time in step (1) is 30 to 60 seconds.

6. The method according to any one of claims 1 to 5, characterized in that: The surface layer slurry in step (2) includes surface layer alumina slurry; Preferably, the surface layer sand material comprises fused corundum sand material; Preferably, the back layer slurry comprises a back layer alumina slurry; Preferably, the back layer abrasive material comprises fused corundum abrasive material.

7. The method according to any one of claims 1 to 6, characterized in that: The particle size of the surface sand material in step (2) is 100-120 mesh; Preferably, the particle size of the backing layer sand material is 70 mesh or 16-30 mesh.

8. The method according to any one of claims 1 to 7, characterized in that: The drying temperature in step (2) is 21-25° C. Preferably, the drying humidity is 40% to 60%.

9. The method according to any one of claims 1 to 8, characterized in that: The drying time is 8 to 10 hours.

10. The method according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: (1) After wiping the surface of the wax mold assembly with the mold shell enhancer, let it stand for 30 to 60 seconds; The shell reinforcement agent includes water, a film-forming agent, a wetting agent, a defoaming agent and a bactericide in a mass ratio of (30-50): (50-70): (1-2): (0.05-0.1): (0.2-0.3); the film-forming agent includes an ammonium alginate aqueous solution with a mass concentration of 8-10 g / L; the wetting agent includes a nonionic surfactant or an anionic surfactant; the defoaming agent includes a silicone defoaming agent; (2) The surface of the wax mold module is dipped with a surface slurry and a surface sand material in turn, and dried at a temperature of 21 to 25° C. and a humidity of 40% to 60% for 8 to 10 hours, and then dipped with a back layer slurry and a back layer sand material in turn to obtain a mold shell for high-temperature alloy precision casting; The surface layer slurry includes surface layer alumina slurry; the surface layer sand material includes fused corundum sand material; the particle size of the surface layer sand material is 100-120 meshes; the back layer slurry includes back layer alumina slurry; the back layer sand material includes fused corundum sand material; the particle size of the back layer sand material is 70 meshes or 16-30 meshes.